Use heading 1 for major titles, or page headers.
Heading 2 should be used for secondary headers, but not for an overarching page title or single top category.
Heading 3 should be used as section headers. It is often used to provide a title for a paragraph or small section of a page.
Heading 4 should be used as smaller, less significant titles.
Note that while headings 5 and 6 are present, we strongly discourage their use.